var AES=new(function(){
	var undefined=function(_){return _;}();
	var Sbox=[
		0x63,0x7c,0x77,0x7b,0xf2,0x6b,0x6f,0xc5,0x30,0x01,0x67,0x2b,0xfe,0xd7,0xab,0x76,
		0xca,0x82,0xc9,0x7d,0xfa,0x59,0x47,0xf0,0xad,0xd4,0xa2,0xaf,0x9c,0xa4,0x72,0xc0,
		0xb7,0xfd,0x93,0x26,0x36,0x3f,0xf7,0xcc,0x34,0xa5,0xe5,0xf1,0x71,0xd8,0x31,0x15,
		0x04,0xc7,0x23,0xc3,0x18,0x96,0x05,0x9a,0x07,0x12,0x80,0xe2,0xeb,0x27,0xb2,0x75,
		0x09,0x83,0x2c,0x1a,0x1b,0x6e,0x5a,0xa0,0x52,0x3b,0xd6,0xb3,0x29,0xe3,0x2f,0x84,
		0x53,0xd1,0x00,0xed,0x20,0xfc,0xb1,0x5b,0x6a,0xcb,0xbe,0x39,0x4a,0x4c,0x58,0xcf,
		0xd0,0xef,0xaa,0xfb,0x43,0x4d,0x33,0x85,0x45,0xf9,0x02,0x7f,0x50,0x3c,0x9f,0xa8,
		0x51,0xa3,0x40,0x8f,0x92,0x9d,0x38,0xf5,0xbc,0xb6,0xda,0x21,0x10,0xff,0xf3,0xd2,
		0xcd,0x0c,0x13,0xec,0x5f,0x97,0x44,0x17,0xc4,0xa7,0x7e,0x3d,0x64,0x5d,0x19,0x73,
		0x60,0x81,0x4f,0xdc,0x22,0x2a,0x90,0x88,0x46,0xee,0xb8,0x14,0xde,0x5e,0x0b,0xdb,
		0xe0,0x32,0x3a,0x0a,0x49,0x06,0x24,0x5c,0xc2,0xd3,0xac,0x62,0x91,0x95,0xe4,0x79,
		0xe7,0xc8,0x37,0x6d,0x8d,0xd5,0x4e,0xa9,0x6c,0x56,0xf4,0xea,0x65,0x7a,0xae,0x08,
		0xba,0x78,0x25,0x2e,0x1c,0xa6,0xb4,0xc6,0xe8,0xdd,0x74,0x1f,0x4b,0xbd,0x8b,0x8a,
		0x70,0x3e,0xb5,0x66,0x48,0x03,0xf6,0x0e,0x61,0x35,0x57,0xb9,0x86,0xc1,0x1d,0x9e,
		0xe1,0xf8,0x98,0x11,0x69,0xd9,0x8e,0x94,0x9b,0x1e,0x87,0xe9,0xce,0x55,0x28,0xdf,
		0x8c,0xa1,0x89,0x0d,0xbf,0xe6,0x42,0x68,0x41,0x99,0x2d,0x0f,0xb0,0x54,0xbb,0x16
	];
	var Rcon=[
		[0x00,0x00,0x00,0x00],
		[0x01,0x00,0x00,0x00],
		[0x02,0x00,0x00,0x00],
		[0x04,0x00,0x00,0x00],
		[0x08,0x00,0x00,0x00],
		[0x10,0x00,0x00,0x00],
		[0x20,0x00,0x00,0x00],
		[0x40,0x00,0x00,0x00],
		[0x80,0x00,0x00,0x00],
		[0x1b,0x00,0x00,0x00],
		[0x36,0x00,0x00,0x00]
	];
	var Cipher=function(input,w){
		var Nb=4;
		var Nr=w.length/Nb-1;
		var state=[[],[],[],[]];
		for(var i=0;i<4*Nb;i++)
			state[i%4][Math.floor(i/4)]=input[i];
		state=AddRoundKey(state,w,0,Nb);
		for(var round=1;round<Nr;round++)
			state=AddRoundKey(MixColumns(ShiftRows(SubBytes(state,Nb),Nb),Nb),w,round,Nb);
		state=AddRoundKey(ShiftRows(SubBytes(state,Nb),Nb),w,Nr,Nb);
		var output=new Array(4*Nb);
		for(var i=0;i<4*Nb;i++)
			output[i]=state[i%4][Math.floor(i/4)];
		return output;
	};
	var SubBytes=function(s,Nb){
		for(var r=0;r<4;r++)
			for(var c=0;c<Nb;c++)
				s[r][c]=Sbox[s[r][c]];
		return s;
	};
	var ShiftRows=function(s,Nb){
		var t=new Array(4);
		for(var r=1;r<4;r++){
			for(var c=0;c<4;c++)
				t[c]=s[r][(c+r)%Nb];
			for(var c=0;c<4;c++)
				s[r][c]=t[c];
		}
		return s;
	};
	var MixColumns=function(s,Nb){
		for(var c=0;c<4;c++){
			var a=new Array(4);
			var b=new Array(4);
			for(var i=0;i<4;i++)
				a[i]=s[i][c],b[i]=s[i][c]&0x80?s[i][c]<<1^0x011b:s[i][c]<<1;
			s[0][c]=b[0]^a[1]^b[1]^a[2]^a[3];
			s[1][c]=a[0]^b[1]^a[2]^b[2]^a[3];
			s[2][c]=a[0]^a[1]^b[2]^a[3]^b[3];
			s[3][c]=a[0]^b[0]^a[1]^a[2]^b[3];
		}
		return s;
	};
	var AddRoundKey=function(state,w,rnd,Nb){
		for(var r=0;r<4;r++)
			for(var c=0;c<Nb;c++)
				state[r][c]^=w[rnd*4+c][r];
		return state;
	};
	var KeyExpansion=function(key){
		var Nb=4;
		var Nk=key.length/4;
		var Nr=Nk+6;
		var w=new Array(Nb*(Nr+1));
		var temp=new Array(4);
		for(var i=0;i<Nk;i++)
			w[i]=[key[4*i],key[4*i+1],key[4*i+2],key[4*i+3]];
		for(var i=Nk;i<(Nb*(Nr+1));i++){
			w[i]=new Array(4);
			for(var t=0;t<4;t++)
				temp[t]=w[i-1][t];
			if(i%Nk==0){
				temp=SubWord(RotWord(temp));
				for(var t=0;t<4;t++)
					temp[t]^=Rcon[i/Nk][t];
			}
			else if(Nk>6&&i%Nk==4)
				temp=SubWord(temp);
			for(var t=0;t<4;t++)
				w[i][t]=w[i-Nk][t]^temp[t];
		}
		return w;
	};
	var SubWord=function(w){
		for(var i=0;i<4;i++)
			w[i]=Sbox[w[i]];
		return w;
	};
	var RotWord=function(w){
		var tmp=w[0];
		for(var i=0;i<4;i++)
			w[i]=w[i+1];
		w[3]=tmp;
		return w;
	};
	var EscCtrlChars=function(str){
		return str.replace(/[\0\t\n\v\f\r\xa0'"!-]/g,function(c){return '!'+c.charCodeAt(0)+'!';});
	};
	var UnescCtrlChars=function(str){
		return str.replace(/!\d\d?\d?!/g,function(c){return String.fromCharCode(c.slice(1,-1));});
	};
	this.Encrypt=function(plaintext,password,nBits){
		if(nBits===undefined)
			nBits=256;
		else if(!(nBits==128||nBits==192||nBits==256))
			return '';
		var nBytes=nBits/8;
		var pwBytes=new Array(nBytes);
		for(var i=0;i<nBytes;i++)
			pwBytes[i]=password.charCodeAt(i)&0xff;
		var key=Cipher(pwBytes,KeyExpansion(pwBytes));
		key=key.concat(key.slice(0,nBytes-16));
		var blockSize=16;
		var counterBlock=new Array(blockSize);
		var nonce=(new Date()).getTime();
		for(var i=0;i<4;i++)
			counterBlock[i]=(nonce>>>i*8)&0xff;
		for(var i=0;i<4;i++)
			counterBlock[i+4]=(nonce/0x100000000>>>i*8)&0xff;
		var keySchedule=KeyExpansion(key);
		var blockCount=Math.ceil(plaintext.length/blockSize);
		var ciphertext=new Array(blockCount);
		for(var b=0;b<blockCount;b++){
			for(var c=0;c<4;c++)
				counterBlock[15-c]=(b>>>c*8)&0xff;
			for(var c=0;c<4;c++)
				counterBlock[15-c-4]=(b/0x100000000>>>c*8);
			var cipherCntr=Cipher(counterBlock,keySchedule);
			var blockLength=b<blockCount-1?blockSize:(plaintext.length-1)%blockSize+1;
			var ct='';
			for(var i=0;i<blockLength;i++)
				ct+=String.fromCharCode(plaintext.charCodeAt(b*blockSize+i)^cipherCntr[i]);
			ciphertext[b]=EscCtrlChars(ct);
		}
		var ctrTxt='';
		for(var i=0;i<8;i++)
			ctrTxt+=String.fromCharCode(counterBlock[i]);
		ctrTxt=EscCtrlChars(ctrTxt);
		return ctrTxt+'-'+ciphertext.join('-');
	};
	this.Decrypt=function(ciphertext,password,nBits){
		if(nBits===undefined)
			nBits=256;
		else if(!(nBits==128||nBits==192||nBits==256))
			return '';
		var nBytes=nBits/8;
		var pwBytes=new Array(nBytes);
		for(var i=0;i<nBytes;i++)
			pwBytes[i]=password.charCodeAt(i)&0xff;
		var pwKeySchedule=KeyExpansion(pwBytes);
		var key=Cipher(pwBytes,pwKeySchedule);
		key=key.concat(key.slice(0,nBytes-16));
		var keySchedule=KeyExpansion(key);
		ciphertext=ciphertext.split('-');
		var blockSize=16;
		var counterBlock=new Array(blockSize);
		var ctrTxt=UnescCtrlChars(ciphertext[0]);
		for(var i=0;i<8;i++)
			counterBlock[i]=ctrTxt.charCodeAt(i);
		var plaintext=new Array(ciphertext.length-1);
		for(var b=1;b<ciphertext.length;b++){
			for(var c=0;c<4;c++)
				counterBlock[15-c]=((b-1)>>>c*8)&0xff;
			for(var c=0;c<4;c++)
				counterBlock[15-c-4]=((b/0x100000000-1)>>>c*8)&0xff;
			var cipherCntr=Cipher(counterBlock,keySchedule);
			ciphertext[b]=UnescCtrlChars(ciphertext[b]);
			var pt='';
			for(var i=0;i<ciphertext[b].length;i++)
				pt+=String.fromCharCode(ciphertext[b].charCodeAt(i)^cipherCntr[i]);
			plaintext[b-1]=pt;
		}
		return plaintext.join('');
	};
});
